Magnetic latch.



F. A. SCHENLE.

MAGNETIC LATCH,

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Application filed April 18, 1914, Serial No. 832,826.

a specifica tion, the. accompanying rlhis invention relates to an improvedmagnetic latch for vuse upon elevator doors or analogous purposes and has Jfor its prirnarj)r object to provide an arrangement of electrical magnets so located with respect to the latch bar as to move the latch bar to its locking or release positions upon the energi nation of the magnets.

'lhe invention has for another and more particular object to provide a latch bar tulcrumed intermediate of its ends, the portions ci the har on opposite sides of the fulcrum extending at an angle with relation to each other, said bar having a latch tongue formed on one end, and two series of electromagnets also arranged at an angle with respect to each other, one series of magnets acting when energized to hold the latch bar in its locking position and the other series to hold said bar in its release or ineffective position. i

The invention has for a further object to provide a magnetic latch device which is extremely simple in its construction, very eil'icient and reliable in practical use and may be manufactured at comparatively small cost.

lil/'ith the above and other objects in view as will become apparent as the description proceeds. the invention consists in certain constructions, combinations and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawing, in which- Figure 1 is a longitudinal section through the latch casing showing the arrangement of the magnets therein, the latch bar being inits locking position. Fig. 2 isfa similar view showing the latch bar in its retracted or release position; Fig. 3 is a section taken on the line 3-3 ot Fig. 1.

Referring in detail to the drawing, 5 designates the latch casing which is 'countersunk in the door jam and is provided with Specification of Letters Eatent.

improvements in Magnetic Latches, e

1re arranged.

bar shown at 13 constitutes the movable ing 5.

.of magnets 11 and 12 are in.

-so that, when the magnets vposition shown in "Fig, 2 of the a tace plate 6 upon :t opening fr' therein thro of the movable latch project. :tace j which is c lever J w iscarried bv the sliding ga or door.

lever is also provided dicated at 10 which with the opening 'l in Y the door is in its clos l position.

`Witl1in the casing'fi. two series of electromagnets indicated at 11 and 12 rospo Y 'lllhese series ot magnets will be observed are disposed at an obtuse angle with relation to each other.

The latch armature, said bar being provided. l opposite edges with trunnions which i journaled in suitable .bearings indicated provided upon the side walls ot the cas- 'lhis latch bar, also has a extending portions disposed u; opposite sides of its pivot, said a.. tions of the latch bar however.. posed at an anpreciabljv less an i tion to the longitudinal axis et are the series ot magnets 11 spect to each other. e bar 13 is formed with lat Acurved locking tongue It-will be understood t able electric current siuppljt7 t a switch of any approved t energized, those in thev otl energized. As there are switches which could be appliet1 mi pose, the arrangement ot the same in th magnet circuit, will at once suggest itel to vthose skilled in the art.

In the practical operation ci the inven` tion, when the magnets 12 are energized. the magnets 11 being simultaneouslv oecnergized, the latch bar 13 is moved from the drawings to the locking position shown in 1. the tongue 15 projecting thi-(nigh the coinciding openings 7 and 10 in casing plate G and the lever 9 respectively. hus the door will be securely7 locked in` its closed position When it is desired to' open the door, the switch is operated so that the magnets 12 will be denergized and the' magnets 11 en-v ergized to attract the' end 'of the latch bar 'doors whereby the door will be sec on which the tongue is formed; and move I said tongue out of the coinciding openings 7 and 10. Inthis manner, it will be seen that I have produced a very simple, reliable .and efficient magnetic latch or locking device for urely held in its closed position. Y

It will be apparent that by adopting slight modifications, the invention may also be applied to safe doors, Windows and in various other instances Where it is desired to easily and quickly lock or release a movable Dart. y 1 As the invention consists of only one mov able part, namely, the latch bar, it Will be apparent thatthe same is extremely eiicient as Well as durable in its construction and may also be produced at small manufacturing cost.

While I have shown and described the preferred construction and arrangement of the several parts, it Will be understood that the invention is nevertheless susceptible of considerable modification therein and I. therefore reserve the privilege of resorting to 'all such legitimate modifications as may be fairly embodied Within the spirit and scope of the appended claim.

Having thus described the invention, what is claimed is:

In a magnetic latch, a latch bar fulcrumed intermediate of its ends and having angularly disposed portions extending upon relatively opposite sides of its ulcrum, and tWo series of electromagnets also arranged at-anangle with respect to each other and opposed to the respective angularly extending portions of the latch bar, to move said bar to its locking or release positions upon the energization of the magnets.

' In' testimony whereof I hereunto aiiix my signature in the presence of tvvo Witnesses.

` FRANK A. SCHOENLE. Witnesses:

ADAM M. KocHnMs, JOHN F. KRIEGBAUM. 

